669146543 has 18 divisors (see below), whose sum is σ = 735629256. Its totient is φ = 608392512.

The previous prime is 669146461. The next prime is 669146549. The reversal of 669146543 is 345641966.

It is not a de Polignac number, because 669146543 - 2¹⁸ = 668884399 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 669146494 and 669146503.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (669146549) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 900230 + ... + 900972.

It is an arithmetic number, because the mean of its divisors is an integer number (40868292).

Almost surely, 2^669146543 is an apocalyptic number.

669146543 is a deficient number, since it is larger than the sum of its proper divisors (66482713).

669146543 is an equidigital number, since it uses as much as digits as its factorization.

669146543 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 915 (or 829 counting only the distinct ones).

The product of its digits is 466560, while the sum is 44.

The square root of 669146543 is about 25867.8669974932. The cubic root of 669146543 is about 874.6623101815.

The spelling of 669146543 in words is "six hundred sixty-nine million, one hundred forty-six thousand, five hundred forty-three".